which, by the way, uses 93% of the energy that's used by the federal government, which is the largest user of energy in this country. as our current chairman of the joint chiefs of staff, general dempsey, has said, without improving our energy security we are not merely standing still as a nation, we are falling behind. let's be clear. energy security is national security. and our military leadership understands this. other countries, including some of our strongest competitors, also understand this and we ignore this fact at our own peril. i saw some of the innovations that the navy has adopted earlier this year when i chaired a hearing for the energy subcommittee on water and power down in norfolk aboard the uss kersarge. the purpose was to highlight the advancements the navy continues to make in harnessing renewable energy resources. up with of those resources i saw is homegrown -- homegrown biofuels. and the navy recently demonstrated the capability of advanced biofuels during massive exercise that featured a carrier strike group, was highlighted by an f-18 traveling twice the spe